Machine for cutting leather or other materials



(No Model.)

3 Sheets-Sheet 1. H. PARSONS.

MACHINE FOR GUTTING LEATHER OR OTHER MATERIALS.

mjm L y Patented Aug. 9, 1887.

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(No Model.)

3 Sheets-Sheet 2.

H. PARSONS. MACHINE FOR CUTTING LEATHER OR OTHER MATERIALS.

Patented Aug. 9, 1887.

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(No Model.) 3 Sheets-Sheet 3.

H. PARSONS.

MACHINE FOR CUTTING LEATHER OR OTHER MATERIALS.

No. 368,108. Patented Aug. 9, l887.-

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UNITEn STATES: PATENT OFFICE.

HENRY PAFSONS, OF MARLBOROUGH, MASSACHUSETTS.

MACHINE'FQR' CUTTING LEA THER OR OTHER MATERIALS.

SPECIFICATION forming part of Letters Patent N0.368,10B, dated August 9, 1887.

Application filed April 27, 1857.

Serial No. 236,288. (No mod. I.)

and useful Improvement in Machines for Outtlng Leather or other Materials, whichwill, I

in connection with the accompanying drawlngs, be hereinafter fully described, and specifically defined in the appended claims.

Figure 1 is a front elevation ofa machine embodylng my invention. Fig. 2 is an end elevation taken as from the right in Fig. 1.

Fig. 3 is also an end elevation taken as from Fig. 4 is alongitudinal' the left in Fig. 1. vertical section taken on line Y Y, Figs. 2, 3, 5, and viewed from the same position as in Fig. 1, or from the left in Fig. 2 and from the right in Figs. 3 5. Fig. 5 is a transverse ver tical section taken on line Z Z, Fig. 1, and as on the same linein Fig. 4, and viewed as from the left in each of said figures. Fig. 6 is a rear elevation-that is, taken from the opposite from Fig. 1, and as viewed from theright in Fig. 2 and from the left in Figs. 3 and 5.

My invention relates to that class of leathercutting power-driven machines termed beam cutters or beam cutting machines, or

beam cutting-presses in whichthe sides of leather or sheets of leather-board or other inaterial to be out are spread out upon aeuttingblock supported by abed that is vertically adjustable, such material being cut by adie that is free to be placed by the'operator in a new position after each cut, the die being forced through thematerial by abeam arranged above the bed,.and which is vertically reoiprocated to effect such result; and it consists in fea tures of novelty hereinafter fully described,-

and pointed out in the claims.

Referring again to the drawings, A A represent the end frames or standards, the form and function of which will, from an inspection of the drawings and their necessary description in connection with the other parts of the machine be clearly understood. Said end frames are rigidly secured together in proper relative position by the front girt, B, and rear girt, O, which at their respective ends are bolted to said standards, as shown in Figs. 1, 2, 3, 6. The bedD is supported and vertically adjusted at each end by screw-rods a,.actuated by hand-wheels b and having their lower ends seated in conical cavities in frames A, as shown in Fig. 4. On each said rod is threaded the nut c, on which is seated the tubular end at of bed D; hence by actuating said screws in the proper direction the ,bed may be raised or lowered in the well-l uown manner.

The vertically-reeiprocating beam E is supported by and actuated through the four rods 0, that slide in bearings secured to frames A, and at their. upper ends are rigidly secured to said beam, while upon the lower ends of the pair at each end of said beam is rigidly secured the cross-head F. (See Fig. 5.) Midway between rods 6 is pivoted in F, at g, the pitmanf, which at its upper end incloses the eccentric 7z,secured upon driving-shaft i. The throw of said eccentric when shaft 13 is rotated produces the vertical reciprocation of beam E and its action upon the cutting-dies.

Said shaft is rotated by means of pulleyG and clutch H, the clutch being rigidly secured upon the shaft,while the pulley isloose, except when forced into frictional contact with the clutch, which contact is effected by means of ing habitually raised by the contractile force of springs Z,- andthe treadles aot upon the pulley through rods n,connected at their lower ends with the treadles and at their-upper ends with the horizontal arm of bell-cranks p, pivotally supported on rear girt, G, the vertical arms of said bell-cranks being pivoted to the horizontal shipper-bar q, which is pivoted to shipper-lever 3, having its pivotal fulcrum at t, while its lower forked end engages in a concentric groove in hub to of the drivingpulley, Figs. 1, 4, 6. Thus by pressing his foot onboard k the operator depresses the treadles, thereby, through'rods n n, crank-levers p 1), rod q, and lever s, forcing the pulley against the clutch and starting the machine.

To allow the operator to remove hisfoot from the treadleboard and yet insurea complete revolution of the machine, I pivot upon bar q a trundle, w, and I secure a cam,'v, on a rod, c, Fig. 6, said cam and trundle being so arranged that as soon as the machinehas been (through depressing the treadles) set in mo tion said cam, by pressing against the trundle, will, through bar 11 and lover 8, hold the pulley in contact with the clutch until the arrival of the beam E at almost its highest limit, when the cam no longer engages the trundle, and by the action of the lifting-springs Z on the treadles the pulley will be held out of contact with the clutch till the operation is repeated.

To stop the machine when the beam is at its highest point, a brake, a, pivoted at y and raised by arm 2 oftreadle'rod m, acting against adjusting-screw 2, engages brake-wheel I on shaft i. Said brake falls by its own weight when released, leaving and freeing the wheel whenever, by depressing the treadles, arm .2 of rod m is lowered, the treadles being rigidly secured to said rod m for that purpose, as the rod thereby acts as a rock-shaft.

One of the most important features of my invention is the method of counterweighting the vertical]y-reciprocating beam E, which, more especially in thelarger machines, (ninefoot beams,) is, by reason of the great strain to which it is subjected, necessarily very heavy, and should therefore be not only in perfect balance but also in perfect crossbalance" as well. To insure both'such balance and cross-balance, I form clutch H and brakewheel Leach as much out of balance as equals one-halfthe weight moved vertically by eccentrics b, so that the united counterweighting of said wheel and clutch equals the weight of the beam and its rods. Such counterweighting of the clutch and wheel is effected by forming one part skeleton-like, as at 4. while the opposite side, as at 5, is solid and continuous, such solid portions being arranged on shaft 2', diametrically opposite the throw of eccentrics 7., so that said solid portions are at the bottom of their circuit when the beam is at its highest point; hence the machine performs its work without the violent shock and vibration that would otherwise result from rapidly reciproeating so heavy and inert a mass of metal as constitutes the beam and its direct coacting a parts.

I claim as my invention 1. In a beam cutting-machine, the combination of reciprocating beam C, its supporting-rods e, cross-heads F, pitman f, pivoted to said cross-heads and engaging the eccen- V tries of the driving-shaft, and a counterweighted clutch mechanism arranged on said drivingshaft, substantially as specified.

2. In a beam cutting-machine, the combination of beam E, its supporting-rods 6, crossheads F, pitman f, shaft 1', with eccentrics h, and a eouuterweighted brake-wheel and clutch mechanism arranged upon the respective ends of said shaft, substantially as specified.

3. In a cutting-machine having a reciproeating beam and a clutch mechanism coacting therewith, the combination of treadlesj, rods n, crank-levers rod q, lever s, pulley G, and clutch H, all combined and arranged to actuate and engage or release said clutch and pul ley, substantially as specified.

4-. The combination, with treadlesj, rods n, crank-levers 1), rod q, lever s, pulley G, and clutch H, of trundle w, secured in said rod q, and cam V, secured on rod 6, whereby said clutch and pulley are automatically held in contact during a portion of their revolution, substantially as specified.

5. The combination of beam E, its supporting'rods e, cross-heads F, pitman f, eccentrics It, shaft 1', and a driving mechanism on said shaft, substantially as specified.

6. The counterweighted clutch mechanism, its driving shaft, the eccentrics arranged thereon, the pitman engaged by said eccentrics, and the cross-heads through which the pitmen operate, substantially as specified.

7. In a beam cutting-machine, the combination, with beam E, of shaft I, pulley G, and counterweighted clutch H, mounted on said shaft, and mechanism connecting said shaft and beam, whereby the rotation of said shaft through said clutch mechanism causes said beam to be vertically reciprocated, substantially as specified.

HENRY PARSONS. Witnesses:

T. W. PORTER, EUGENE HUMPHREY. 

